Calculator App

This project is a simple Calculator App built using the Kivy framework for Python. It provides a graphical user interface (GUI) for performing basic mathematical calculations as well as trigonometric and logarithmic operations.

Features

• Basic Arithmetic: Addition, subtraction, multiplication, and division.
• Advanced Operations:
  • Trigonometric functions: sin, cos, tan.
  • Square root (sqrt), exponentiation (^), and logarithm (log).
• Keyboard Support:
  • Use the keyboard for numeric and operator input.
  • Special keys like Enter for equals, Backspace for delete, and C for clearing the input.
• History Display: Shows the last performed calculations (limited implementation).

Requirements

• Python 3.8+
• Kivy 2.1.0+
• Math module (built into Python)

Installation

1. Clone or download the repository.

2. Install the required dependencies:

   pip install kivy

3. Run the application:

   python calculator.py

Usage

• Launch the application to open the calculator window.
• Use the on-screen buttons or keyboard to input calculations.
• Supported buttons:
  • C: Clear the current input.
  • DEL: Delete the last character.
  • =: Evaluate the current expression.
  • sin, cos, tan: Trigonometric functions.
  • sqrt: Square root.
  • log: Logarithm (base 10).
  • ^: Exponentiation.
  • %: Percentage.

Key Bindings

• Numbers and Operators: Direct input from the keyboard (e.g., 1, +, -) (For Mac OS keyboard mapping only).
• Special Keys:
  • Enter: Evaluate the expression.
  • Backspace: Delete the last character.
• Numpad Support: Handles numpad keys for numbers and operators.

Code Structure

• Calculator Class:

  • Handles UI creation and event processing.
  • Processes input from buttons and keyboard.
  • Performs mathematical operations and updates the display.

• Key Methods:

  • process_input(input_text): Processes user input and updates the display.
  • on_button_press(instance): Handles button press events.
  • on_key_down(instance, keyboard, keycode, text, modifiers): Handles keyboard events.
  • backspace(): Deletes the last character from the input.

Limitations

• Trigonometric Functions: Arguments for sin, cos, and tan must be in radians.
• Logarithm: Only supports base 10.

License

This project is licensed under the MIT License.

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